remove the unsafe os.chdir()
remove the unsafe os.chdir()

Signed-off-by: Sven Dowideit <8f8f0ff1658347091746565264d8c93c6f0e67f6@csiro.au>

tomkralidis/pywps,bird-house/PyWPS,ldesousa/PyWPS,geopython/pywps